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Finding the Fourth Proportional to 259,872.40, 389,808.60 and 112,128.40

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Solution

The fourth proportional to 259,872.40, 389,808.60 and 112,128.40 is: 168,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,872.40 : 389,808.60 = 112,128.40 : x
  2. Step 2: Convert to fraction form
    259,872.40/389,808.60 = 112,128.40/x
  3. Step 3: Cross multiply
    259,872.40x = 389,808.60 × 112,128.40
  4. Step 4: Simplify right side
    259,872.40x = 43,708,614,624.24
  5. Step 5: Solve for x
    x = 43,708,614,624.24/259,872.40
  6. Step 6: Final answer
    x = 168,192.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.